Airborne oxygen preparing-nitrogen preparing coupling system with expansion machine and method thereof

Abstract

The invention discloses an airborne oxygen preparing-nitrogen preparing coupling system with an expansion machine and a method thereof, and belongs to the aviation system technical field. A specific principle comprises that entraining air from an engine gas compressor is divided into two ways after pressure stabilization and cooling; one way of entraining air is used for doing work to the expansion machine for driving two compressors; the other way of entraining air is boosted by the first compressor, and then passes through a hollow fiber membrane nitrogen preparing system to prepare nitrogen-rich gas for an inserting aircraft fuel tank; discharged exhaust gas (oxygen-rich gas) in the nitrogen preparing system is boosted by the second compressor and then passes through a molecular sieve oxygen preparing system to obtain oxygen, and oxygen flows into a cabin or a cockpit and is outputted as oxygen for the flight crew to breathe. The system has no electrically driven equipment, is feasible to prepare, high in separation membrane efficiency, reliable in operation, small in size and light in weight, and conforms to the airborne equipment requirements.

Description

technical field [0001] The invention belongs to the technical field of aviation systems, and relates to an airborne oxygen-generating-nitrogen-generating coupling system, in particular to an airborne oxygen-generating-nitrogen generating coupled system and method with an expander. Background technique [0002] As we all know, in order to ensure long-term battery life, advanced fighter jets have abandoned the traditional method of gas oxygen and liquid oxygen as the only source of oxygen supply, and have turned to airborne oxygen generation technology. It uses inexhaustible air as an oxygen supply source, and through the separation of air by onboard equipment, it meets the needs of the crew for breathing oxygen. Therefore, it has completely changed the situation that the aircraft's endurance time is limited by the onboard oxygen source, and has brought revolutionary changes to the aviation oxygen supply system. Not only that, the airborne oxygen generation technology also gr...

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Problems solved by technology

[0006] In order to overcome the shortcomings of the existing aircraft onboard oxygen and nitrogen production systems that cannot effectively reduce the amount of bleed air from the engine compressor, the system is complex, and the work reliability is low, the present invention provides a new type of airborne oxygen and nitrogen production coupling system and methods

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